CN108152693B - GIL equipment three-post insulator fault simulation test platform and simulation test method - Google Patents
GIL equipment three-post insulator fault simulation test platform and simulation test method Download PDFInfo
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- CN108152693B CN108152693B CN201810081769.9A CN201810081769A CN108152693B CN 108152693 B CN108152693 B CN 108152693B CN 201810081769 A CN201810081769 A CN 201810081769A CN 108152693 B CN108152693 B CN 108152693B
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- 239000012212 insulator Substances 0.000 title claims abstract description 83
- 238000004088 simulation Methods 0.000 title claims abstract description 27
- 238000010998 test method Methods 0.000 title abstract description 4
- 238000009413 insulation Methods 0.000 claims abstract description 17
- 238000002955 isolation Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 31
- 229910052802 copper Inorganic materials 0.000 claims description 31
- 239000010949 copper Substances 0.000 claims description 31
- 238000004064 recycling Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000011324 bead Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000009991 scouring Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002923 metal particle Substances 0.000 abstract description 3
- 239000000725 suspension Substances 0.000 abstract description 3
- 230000000712 assembly Effects 0.000 abstract 2
- 238000000429 assembly Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1245—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Insulating Materials (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses a GIL equipment three-post insulator fault simulation test platform and a simulation test method, wherein the platform comprises an outlet sleeve, and a GIS bus first air chamber and a GIS bus second air chamber which are mutually adjacent and independent are arranged at the bottom of the outlet sleeve; one end of the GIL pipe bus is sealed and connected with the outer wall of the second gas chamber of the GIS bus, and the other end of the GIL pipe bus is open; an air-isolation insulating basin is arranged at the end part of the GIL main pipe, a contact seat is arranged in the air-isolation insulating basin; three sliding observation devices are arranged in the GIL pipe nut an observation window for the discharge process of the post insulator assembly; a GIL pipe nut hand hole for installing a temperature rise terminal board is arranged in the GIL pipe nut; the pipe nut is provided with a pipe nut, which is detachably mounted in the open end of the GIL tube female. The platform can conveniently replace sliding three-post insulator assemblies with different insulating working conditions, simulate insulating faults such as burrs, pollution, metal particles, metal suspension and the like on the surfaces of the sliding three-post insulator assemblies, measure ultrahigh frequency signals by utilizing the air insulation insulator, and record the discharging process through the observation window.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a fault simulation test platform and a simulation test method for a three-post insulator of GIL equipment.
Background
The insulation faults and the heating faults of 550kV GIL equipment frequently occur, 2 three-post insulators burst, 2 three-post insulators are partially discharged to be abnormal, and a plurality of three-post insulators are externally flashover faults in the range of the company in recent years, and as the GIL equipment is mainly applied to the feed line areas of the alternating current filter and the converter transformer, the GIL equipment breaks down, so that the large group of alternating current filters or the converter transformer is stopped, the direct current transmission power is greatly reduced, and the safe operation of a power grid is endangered. The three-post insulator of the GIL equipment is mainly subjected to the comprehensive effect of an electric field and a thermal field in the operation process, and at present, a test platform for developing the comprehensive effect of the electric field and the thermal field of the three-post insulator of the GIL equipment is lacking at home and abroad. In order to find out the root cause of insulation fault and heating fault of three-post insulator in GIL operation process, it is important to develop a set of GIL equipment three-post insulator insulation fault and heating fault simulation test platform.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a fault simulation test platform for a three-post insulator of a GIL device
In order to achieve the above purpose, the technical scheme of the invention is as follows:
GIL equipment three-post insulator fault simulation test platform includes
The outlet sleeve is provided with a GIS bus first air chamber and a GIS bus second air chamber which are adjacent and independent, and the GIS bus first air chamber and the GIS bus second air chamber are respectively provided with an air charging and discharging port;
one end of the GIL pipe bus is sealed and connected with the outer wall of the second gas chamber of the GIS bus, and the other end of the GIL pipe bus is open; an air-isolation insulating basin is arranged at the end part of the GIL mother pipe, and a contact seat is arranged in the air-isolation insulating basin; an observation window for observing the discharge process of the sliding three-post insulator assembly is arranged in the GIL tube bus; a GIL pipe nut hand hole for installing a temperature rise terminal board is arranged in the GIL pipe nut;
the pipe nut is detachably arranged in the opening end of the GIL pipe nut, a GIL pipe nut air chamber is formed between the pipe nut and the GIL pipe nut, and the GIL pipe nut air chamber is provided with an air charging and discharging port; a pipe nut hand hole is formed in the pipe nut, temperature rise wiring boards are arranged on the inner wall and the outer wall of the pipe nut hand hole, and a pipe nut hand hole cover plate is detachably arranged on the opening end face of the pipe nut hand hole;
the sliding three-pillar insulator assembly is arranged in the GIL pipe nut and is used for simulating different fault conditions of the three-pillar insulator.
Go out GIS busbar first air chamber, GIS busbar second air chamber and GIL pipe mother air chamber and all adopt the fixed bolster to support, GIS busbar first air chamber, GIS busbar second air chamber, GIL pipe mother air chamber and fixed bolster between set up insulating spacer, during insulation test, reliably ground through the ground connection copper bar, during the temperature rise test, dismantle the ground connection copper bar.
The pipe nut is detachably and hermetically arranged in the opening end of the GIL pipe nut in a flange connection mode.
The sliding three-post insulator assembly comprises a particle catcher, a sliding three-post insulator and a conducting rod, wherein two nylon rollers are arranged on supporting legs of the sliding three-post insulator, a copper bead electrode is arranged at the top end of the sliding three-post insulator, and the copper bead electrode is reliably contacted with the inner wall of the GIL pipe nut by being crimped by a small spring; one end of the conducting rod is directly inserted into the contact seat of the air-isolation insulator, and the other end of the conducting rod is provided with a fastening bolt and is surrounded by a detachable pressure equalizing shielding cover.
When the simulation test is carried out, the first gas chamber of the GIS bus, the second gas chamber of the GIS bus and the gas chamber of the GIL pipe are all maintained at 0.5Mpa.
The outlet sleeve is a 500KV composite outer sleeve outlet sleeve.
The invention further aims to provide a GIL equipment three-post insulator insulation fault simulation method, which is carried out by adopting the GIL equipment three-post insulator fault simulation test platform and comprises the following steps:
step 1, under the condition of disconnecting a power supply, checking whether the air pressure of a first GIS bus air chamber, a second GIS bus air chamber and a GIL pipe bus air chamber is maintained at 0.5Mpa;
step 2, recycling gas of a second gas chamber of the GIS bus by using an SF6 recycling device, so that the gas pressure of the second gas chamber of the GIS bus is reduced to 0.25MPa, and stopping;
step 3, recycling gas of the GIL pipe mother gas chamber by using an SF6 recycling device, so that the gas pressure of the GIL pipe mother gas chamber is reduced to zero pressure and stopped;
step 4, disassembling the pipe nut;
step 5, inserting the sliding three-pillar insulator assembly onto a contact seat in the air isolation basin;
and 6, checking whether the copper bead electrode at the top of the sliding three-post insulator is reliably connected with the inner wall of the GIL pipe bus, and ensuring the reliable grounding of the detachable copper bar.
Step 7, wiping the inner wall of the GIL pipe bus by using scouring pad and alcohol;
step 8, the pipe nut is assembled again;
step 9, vacuumizing the GIL tube mother gas chamber until the pressure reaches 100Pa and the pressure is maintained for 0.5h;
step 10, recharging the GIL pipe mother gas chamber and the GIS second gas chamber by using qualified SF6, and stopping inflation when the pressure of the gas chamber is 0.5Mpa;
step 11, connecting the high-voltage lead wire into a voltage equalizing ring of the wire outlet sleeve;
step 12, horizontally aligning the high-speed camera to the observation window;
and step 13, uniformly increasing test voltage, and researching various insulation failure mechanisms of the three-post insulator.
The invention also aims to provide a heating fault simulation method for the three-post insulator of the GIL equipment, which is carried out by adopting the fault simulation test platform for the three-post insulator of the GIL equipment and comprises the following steps:
step 1, under the condition of disconnecting a power supply, checking whether the air pressure of a first GIS bus air chamber, a second GIS bus air chamber and a GIL pipe bus air chamber is maintained at 0.5Mpa;
step 2, recycling gas of a second gas chamber of the GIS bus by using an SF6 recycling device, so that the gas pressure of the second gas chamber of the GIS bus is reduced to 0.25MPa, and stopping;
step 3, recycling gas of the GIL pipe mother gas chamber by using an SF6 recycling device, so that the gas pressure of the GIL pipe mother gas chamber is reduced to zero pressure and stopped;
step 4, disassembling the pipe nut;
step 5, inserting the sliding three-pillar insulator assembly onto a contact seat in the air isolation basin;
step 6, arranging a temperature rise thermocouple at a position needing to monitor temperature rise, and leading out a thermocouple wire through a terminal board at a female hand hole of the GIL pipe;
step 7, disassembling the shielding cover, fastening a soft copper strip by utilizing bolts at the end parts of the conducting rods of the three-post insulator assembly, returning a tube busbar, and disassembling a cover plate of a tube busbar hand hole, wherein the other end of the soft copper strip is connected with an inner wall wiring board of the tube busbar hand hole;
step 8, a mother hand hole cover plate of the back-up tube is disassembled to be grounded;
step 9, vacuumizing the GIL tube mother gas chamber until the pressure reaches 100Pa and the pressure is maintained for 0.5h;
step 10, recharging the GIL pipe mother gas chamber and the GIS second gas chamber by using qualified SF6, and stopping inflation when the pressure of the gas chamber is 0.5Mpa;
step 11, respectively connecting the output end of the heavy current generator to a junction plate of an outgoing line sleeve and a junction plate of the outer wall of a detachable pipe female hand hole;
and 12, changing the transmission current of a heavy current generator, and researching the heating fault of the three-post insulator of the GIL equipment.
Compared with the prior art, the invention has the beneficial effects that:
the invention can conveniently replace the sliding three-post insulator assembly with different insulating working conditions, simulate the insulating faults such as burrs, pollution, metal particles, metal suspension and the like on the surface of the sliding three-post insulator assembly, measure the ultrahigh frequency signal by using the air-isolation insulator, and record the discharging process by the observation window. In addition, the three-post insulator assembly conducting rod is connected with the inner wall wiring board of the detachable pipe nut hand hole through the detachable soft copper strip, the grounding copper bar is removed, the output end of the high-current generator is connected with the wire outlet sleeve wiring board and the outer wall wiring board of the detachable pipe nut hand hole, and the three-post insulator heating faults are simulated when different running currents are generated. The test platform can be used for deeply analyzing various insulation faults and heating faults of the three-post insulator of the GIL equipment, and specific rectifying measures are provided for effectively preventing the three-post insulator from generating insulation faults and heating faults.
Drawings
FIG. 1 is a schematic diagram of a simulated insulation fault according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a simulated heat failure according to an embodiment of the present invention;
in the figure: 1. a wire outlet sleeve; 2. GIS bus air chamber; 3. GIL tube stock; 4. a tube master; 5. sliding the three-post insulator assembly; 6. an air-isolation insulating basin; 7. a contact base; 8. a shield; 9. an observation window; 10. GIL tube female hand hole; 11. a tube nut hand hole; 12. a soft copper strip; 13. a grounding copper bar; 14. a fixed bracket; 15. sliding the three-post insulator; 16. a particle catcher; 17. a conductive rod; 18. an insulating spacer; 19. a gas filling and discharging port; 20. and (3) a flange.
Detailed Description
The present invention will be described in further detail with reference to the drawings and detailed description.
Examples:
referring to fig. 1-2, the three-post insulator fault simulation test platform for GIL equipment provided in this embodiment includes a 500kV outlet sleeve 1, a GIS busbar air chamber 2, a GIL busbar 3, a busbar 4, a sliding three-post insulator assembly 5, an air-insulated insulating basin 6, a contact base 7, a shielding case 8, an observation window 9, a GIL busbar hand hole 10, a busbar hand hole 11, a soft copper strap 12, a grounding copper bar 13 and a fixing bracket 14.
The test platform is provided with two GIS busbar air chambers and a GIL pipe busbar air chamber, each air chamber is provided with an air charging and discharging port, 3 air chambers are independent air chambers, the air pressure of the independent air chambers is 0.5MPa, a first independent air chamber of a GIS busbar is positioned at the bottom of an outgoing line sleeve 1, a second independent air chamber of the GIS busbar is adjacent to the first independent air chamber, the second independent air chamber of the GIS busbar can be used as a transition air chamber when the three-post insulator assembly 5 is replaced, the shell of the GIL pipe busbar air chamber is formed by connecting GIL pipe busbar 3 and pipe busbar 4 through a flange 20, the flange 20 adopts a double-sealing technology to ensure air tightness, phi 40cm pipe busbar 11 is arranged on the right side of the pipe busbar 4, a temperature rise wiring board is arranged on the inner wall of the pipe busbar 11, and a temperature rise wiring board is also arranged on the outer wall of the pipe busbar.
And a phi 40cm observation window 9 is arranged right in front of the GIL pipe nut 3, a phi 40cm GIL pipe nut hand hole 10 is arranged right below the GIL pipe nut 4, the observation window 9 is used for monitoring and recording the test discharge process of the three-post insulator, and a temperature rise terminal board is installed by using the GIL pipe nut hand hole 10.
The sliding three-post insulator assembly 5 comprises a particle catcher 16, a sliding three-post insulator 15, and a conductive rod 17. The support leg of the sliding three-pillar insulator is provided with two nylon rollers, the top end of the support leg is provided with a copper bead electrode, and the copper bead electrode is reliably contacted with the inner wall of the GIL pipe nut 3 by being crimped by a small spring; one end of the conducting rod 17 is directly inserted into the contact seat 7 of the air-isolation insulating basin 6, and the other end is provided with 4 fastening bolts and is surrounded by the detachable pressure equalizing shielding cover 8.
The outgoing line sleeve 1, the GIS busbar gas chamber 2 and the GIL pipe busbar of the test platform are supported by adopting the fixed support 14, the insulating gaskets 18 are arranged between the GIS busbar gas chamber and the GIL pipe busbar gas chamber and the fixed support 14, and the grounding copper bar 13 is reliably grounded through the grounding copper bar 13 in the insulation test and is disassembled in the temperature rise test.
The pipe nut 4 is disassembled, the sliding three-support column assembly with various different working conditions can be replaced, insulation faults such as burrs, pollution, metal particles, metal suspension and the like are simulated on the surface of the sliding three-support column insulator, an air insulation insulator is utilized for measuring an ultrahigh frequency signal, and the discharge process is recorded through an observation window.
The shielding cover 8 is disassembled, the conductive rod 17 of the three-post insulator assembly is connected with the inner wall wiring board of the pipe nut hand hole 11 through the soft copper belt 12, the grounding copper bar 13 is disassembled, the output end of the heavy current generator is connected with the wiring board of the wire outlet sleeve 1 and the outer wall wiring board of the pipe nut hand hole 11, and the heating faults of the three-post insulator during different running currents are simulated.
In addition, the embodiment also provides a GIL equipment three-post insulator insulation fault simulation method, which is carried out by adopting the GIL equipment three-post insulator fault simulation test platform and specifically comprises the following steps:
step 1, under the condition of disconnecting a power supply, checking whether the air pressure of a first GIS bus air chamber, a second GIS bus air chamber and a GIL pipe bus air chamber is maintained at 0.5Mpa;
step 2, recycling gas of a second gas chamber of the GIS bus by using an SF6 recycling device, so that the gas pressure of the second gas chamber of the GIS bus is reduced to 0.25MPa, and stopping;
step 3, recycling gas of the GIL pipe mother gas chamber by using an SF6 recycling device, so that the gas pressure of the GIL pipe mother gas chamber is reduced to zero pressure and stopped;
step 4, disassembling the pipe nut;
step 5, inserting the sliding three-pillar insulator assembly onto a contact seat in the air isolation basin;
and 6, checking whether the copper bead electrode at the top of the sliding three-post insulator is reliably connected with the inner wall of the GIL pipe bus, and ensuring the reliable grounding of the detachable copper bar.
Step 7, wiping the inner wall of the GIL pipe bus by using scouring pad and alcohol;
step 8, the pipe nut is assembled again;
step 9, vacuumizing the GIL tube mother gas chamber until the pressure reaches 100Pa and the pressure is maintained for 0.5h;
step 10, recharging the GIL pipe mother gas chamber and the GIS second gas chamber by using qualified SF6, and stopping inflation when the pressure of the gas chamber is 0.5Mpa;
step 11, connecting the high-voltage lead wire into a voltage equalizing ring of the wire outlet sleeve;
step 12, horizontally aligning the high-speed camera to the observation window;
and step 13, uniformly increasing test voltage, and researching various insulation failure mechanisms of the three-post insulator.
Meanwhile, the embodiment also provides a heating fault simulation method for the three-post insulator of the GIL equipment, which is also carried out by adopting the fault simulation test platform for the three-post insulator of the GIL equipment, and specifically comprises the following steps:
step 1, under the condition of disconnecting a power supply, checking whether the air pressure of a first GIS bus air chamber, a second GIS bus air chamber and a GIL pipe bus air chamber is maintained at 0.5Mpa;
step 2, recycling gas of a second gas chamber of the GIS bus by using an SF6 recycling device, so that the gas pressure of the second gas chamber of the GIS bus is reduced to 0.25MPa, and stopping;
step 3, recycling gas of the GIL pipe mother gas chamber by using an SF6 recycling device, so that the gas pressure of the GIL pipe mother gas chamber is reduced to zero pressure and stopped;
step 4, disassembling the pipe nut;
step 5, inserting the sliding three-pillar insulator assembly onto a contact seat in the air isolation basin;
step 6, arranging a temperature rise thermocouple at a position needing to monitor temperature rise, and leading out a thermocouple wire through a terminal board at a female hand hole of the GIL pipe;
step 7, disassembling the shielding cover, fastening a soft copper strip by utilizing bolts at the end parts of the conducting rods of the three-post insulator assembly, returning a tube busbar, and disassembling a cover plate of a tube busbar hand hole, wherein the other end of the soft copper strip is connected with an inner wall wiring board of the tube busbar hand hole;
step 8, a mother hand hole cover plate of the back-up tube is disassembled to be grounded;
step 9, vacuumizing the GIL tube mother gas chamber until the pressure reaches 100Pa and the pressure is maintained for 0.5h;
step 10, recharging the GIL pipe mother gas chamber and the GIS second gas chamber by using qualified SF6, and stopping inflation when the pressure of the gas chamber is 0.5Mpa;
step 11, respectively connecting the output end of the heavy current generator to a junction plate of an outgoing line sleeve and a junction plate of the outer wall of a detachable pipe female hand hole;
and 12, changing the transmission current of a heavy current generator, and researching the heating fault of the three-post insulator of the GIL equipment.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the essence of the present invention are intended to be included within the scope of the present invention.
Claims (5)
- GIL equipment three post insulators fault simulation test platform, its characterized in that includes:the outlet sleeve is provided with a GIS bus first air chamber and a GIS bus second air chamber which are adjacent and independent, and the GIS bus first air chamber and the GIS bus second air chamber are respectively provided with an air charging and discharging port;one end of the GIL pipe bus is sealed and connected with the outer wall of the second gas chamber of the GIS bus, and the other end of the GIL pipe bus is open; an air isolation insulating basin is arranged at the end part of the GIL pipe bus, and a contact seat is arranged in the air isolation insulating basin; an observation window for observing the discharge process of the sliding three-post insulator assembly is arranged in the GIL tube bus; a GIL pipe nut hand hole for installing a temperature rise terminal board is arranged in the GIL pipe nut;the pipe nut is detachably arranged in the opening end of the GIL pipe nut, a GIL pipe nut air chamber is formed between the pipe nut and the GIL pipe nut, and the GIL pipe nut air chamber is provided with an air charging and discharging port; a pipe nut hand hole is formed in the pipe nut, temperature rise wiring boards are arranged on the inner wall and the outer wall of the pipe nut hand hole, and a pipe nut hand hole cover plate is detachably arranged on the opening end face of the pipe nut hand hole;the sliding three-pillar insulator assembly is arranged in the GIL pipe nut and is used for simulating different fault conditions of the three-pillar insulator;the GIS busbar first air chamber, the GIS busbar second air chamber and the GIL pipe busbar air chamber are all supported by adopting a fixed bracket; insulating gaskets are arranged among the first GIS bus air chamber, the second GIS bus air chamber, the GIL pipe air chamber and the fixed support, and the grounding copper bar is reliably grounded during an insulating test, and is disassembled during a temperature rise test;the pipe nut is detachably and hermetically arranged in the opening end of the GIL pipe nut in a flange connection mode;the sliding three-post insulator assembly comprises a particle catcher, a sliding three-post insulator and a conducting rod, wherein two nylon rollers are arranged on supporting legs of the sliding three-post insulator, a copper bead electrode is arranged at the top end of the sliding three-post insulator, and the copper bead electrode is reliably contacted with the inner wall of the GIL pipe nut by being crimped by a small spring; one end of the conducting rod is directly inserted into the air-isolation insulating basin contact seat, and the other end of the conducting rod is provided with a fastening bolt and is surrounded by a detachable pressure equalizing shielding cover.
- 2. The GIL plant three-post insulator fault simulation test platform of claim 1, wherein the GIS bus first plenum, the GIS bus second plenum, and the GIL tube bus plenum are all maintained at 0.5Mpa when performing the simulation test.
- 3. The GIL plant three-post insulator fault simulation test platform of claim 1, wherein the outlet sleeve is a 500KV composite jacket outlet sleeve.
- The GIL equipment three-post insulator insulation fault simulation method is characterized by comprising the following steps of:step 1, under the condition of disconnecting a power supply, checking whether the air pressure of a first GIS bus air chamber, a second GIS bus air chamber and a GIL pipe bus air chamber is maintained at 0.5Mpa;step 2, recycling gas of a second gas chamber of the GIS bus by using an SF6 recycling device, so that the gas pressure of the second gas chamber of the GIS bus is reduced to 0.25MPa, and stopping;step 3, recycling gas of the GIL pipe mother gas chamber by using an SF6 recycling device, so that the gas pressure of the GIL pipe mother gas chamber is reduced to zero pressure and stopped;step 4, disassembling the pipe nut;step 5, inserting the sliding three-pillar insulator assembly onto a contact seat in the air-isolation insulating basin;step 6, checking whether the copper bead electrode at the top of the sliding three-post insulator is reliably connected with the inner wall of the GIL pipe bus or not, and ensuring reliable grounding of the detachable copper bar;step 7, wiping the inner wall of the GIL pipe bus by using scouring pad and alcohol;step 8, the pipe nut is assembled again;step 9, vacuumizing the GIL tube mother gas chamber until the pressure reaches 100Pa and the pressure is maintained for 0.5h;step 10, recharging the GIL pipe mother gas chamber and the GIS second gas chamber by using qualified SF6, and stopping inflation when the pressure of the gas chamber is 0.5Mpa;step 11, connecting the high-voltage lead wire into a voltage equalizing ring of the wire outlet sleeve;step 12, horizontally aligning the high-speed camera to the observation window;and step 13, uniformly increasing test voltage, and researching various insulation failure mechanisms of the three-post insulator.
- The GIL equipment three-post insulator heating fault simulation method is characterized by comprising the following steps of:step 1, under the condition of disconnecting a power supply, checking whether the air pressure of a first GIS bus air chamber, a second GIS bus air chamber and a GIL pipe bus air chamber is maintained at 0.5Mpa;step 2, recycling gas of a second gas chamber of the GIS bus by using an SF6 recycling device, so that the gas pressure of the second gas chamber of the GIS bus is reduced to 0.25MPa, and stopping;step 3, recycling gas of the GIL pipe mother gas chamber by using an SF6 recycling device, so that the gas pressure of the GIL pipe mother gas chamber is reduced to zero pressure and stopped;step 4, disassembling the pipe nut;step 5, inserting the sliding three-pillar insulator assembly onto a contact seat in the air-isolation insulating basin;step 6, arranging a temperature rise thermocouple at a position needing to monitor temperature rise, and leading out a thermocouple wire through a terminal board at a female hand hole of the GIL pipe;step 7, disassembling the shielding cover, fastening a soft copper strip by utilizing bolts at the end parts of the conducting rods of the three-post insulator assembly, returning a tube busbar, and disassembling a cover plate of a tube busbar hand hole, wherein the other end of the soft copper strip is connected with an inner wall wiring board of the tube busbar hand hole;step 8, a mother hand hole cover plate of the back-up tube is disassembled to be grounded;step 9, vacuumizing the GIL tube mother gas chamber until the pressure reaches 100Pa and the pressure is maintained for 0.5h;step 10, recharging the GIL pipe mother gas chamber and the GIS second gas chamber by using qualified SF6, and stopping inflation when the pressure of the gas chamber is 0.5Mpa;step 11, respectively connecting the output end of the heavy current generator to a junction plate of an outgoing line sleeve and a junction plate of the outer wall of a detachable pipe female hand hole;and 12, changing the transmission current of a heavy current generator, and researching the heating fault of the three-post insulator of the GIL equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810081769.9A CN108152693B (en) | 2018-01-29 | 2018-01-29 | GIL equipment three-post insulator fault simulation test platform and simulation test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810081769.9A CN108152693B (en) | 2018-01-29 | 2018-01-29 | GIL equipment three-post insulator fault simulation test platform and simulation test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108152693A CN108152693A (en) | 2018-06-12 |
| CN108152693B true CN108152693B (en) | 2024-04-02 |
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| CN113567264B (en) * | 2021-08-24 | 2024-04-26 | 国家电网公司华中分部 | Experimental device and experimental method capable of simultaneously simulating high voltage and high temperature of GIL inner conductor |
| CN113933009A (en) * | 2021-11-09 | 2022-01-14 | 广东电网有限责任公司电力科学研究院 | Variable-temperature three-post insulator vibration simulation testing device |
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